arch/powerpc/kvm/powerpc.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License, version 2, as
   4  * published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public License
  12  * along with this program; if not, write to the Free Software
  13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14  *
  15  * Copyright IBM Corp. 2007
  16  *
  17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
  19  */
  20
  21 #include <linux/errno.h>
  22 #include <linux/err.h>
  23 #include <linux/kvm_host.h>
  24 #include <linux/vmalloc.h>
  25 #include <linux/hrtimer.h>
  26 #include <linux/sched/signal.h>
  27 #include <linux/fs.h>
  28 #include <linux/slab.h>
  29 #include <linux/file.h>
  30 #include <linux/module.h>
  31 #include <linux/irqbypass.h>
  32 #include <linux/kvm_irqfd.h>
  33 #include <asm/cputable.h>
  34 #include <linux/uaccess.h>
  35 #include <asm/kvm_ppc.h>
  36 #include <asm/tlbflush.h>
  37 #include <asm/cputhreads.h>
  38 #include <asm/irqflags.h>
  39 #include <asm/iommu.h>
  40 #include <asm/switch_to.h>
  41 #include <asm/xive.h>
  42 #ifdef CONFIG_PPC_PSERIES
  43 #include <asm/hvcall.h>
  44 #include <asm/plpar_wrappers.h>
  45 #endif
  46
  47 #include "timing.h"
  48 #include "irq.h"
  49 #include "../mm/mmu_decl.h"
  50
  51 #define CREATE_TRACE_POINTS
  52 #include "trace.h"
  53
  54 struct kvmppc_ops *kvmppc_hv_ops;
  55 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
  56 struct kvmppc_ops *kvmppc_pr_ops;
  57 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
  58
  59
  60 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  61 {
  62         return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
  63 }
  64
  65 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
  66 {
  67         return false;
  68 }
  69
  70 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
  71 {
  72         return 1;
  73 }
  74
  75 /*
  76  * Common checks before entering the guest world.  Call with interrupts
  77  * disabled.
  78  *
  79  * returns:
  80  *
  81  * == 1 if we're ready to go into guest state
  82  * <= 0 if we need to go back to the host with return value
  83  */
  84 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
  85 {
  86         int r;
  87
  88         WARN_ON(irqs_disabled());
  89         hard_irq_disable();
  90
  91         while (true) {
  92                 if (need_resched()) {
  93                         local_irq_enable();
  94                         cond_resched();
  95                         hard_irq_disable();
  96                         continue;
  97                 }
  98
  99                 if (signal_pending(current)) {
 100                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
 101                         vcpu->run->exit_reason = KVM_EXIT_INTR;
 102                         r = -EINTR;
 103                         break;
 104                 }
 105
 106                 vcpu->mode = IN_GUEST_MODE;
 107
 108                 /*
 109                  * Reading vcpu->requests must happen after setting vcpu->mode,
 110                  * so we don't miss a request because the requester sees
 111                  * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
 112                  * before next entering the guest (and thus doesn't IPI).
 113                  * This also orders the write to mode from any reads
 114                  * to the page tables done while the VCPU is running.
 115                  * Please see the comment in kvm_flush_remote_tlbs.
 116                  */
 117                 smp_mb();
 118
 119                 if (kvm_request_pending(vcpu)) {
 120                         /* Make sure we process requests preemptable */
 121                         local_irq_enable();
 122                         trace_kvm_check_requests(vcpu);
 123                         r = kvmppc_core_check_requests(vcpu);
 124                         hard_irq_disable();
 125                         if (r > 0)
 126                                 continue;
 127                         break;
 128                 }
 129
 130                 if (kvmppc_core_prepare_to_enter(vcpu)) {
 131                         /* interrupts got enabled in between, so we
 132                            are back at square 1 */
 133                         continue;
 134                 }
 135
 136                 guest_enter_irqoff();
 137                 return 1;
 138         }
 139
 140         /* return to host */
 141         local_irq_enable();
 142         return r;
 143 }
 144 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
 145
 146 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 147 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
 148 {
 149         struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
 150         int i;
 151
 152         shared->sprg0 = swab64(shared->sprg0);
 153         shared->sprg1 = swab64(shared->sprg1);
 154         shared->sprg2 = swab64(shared->sprg2);
 155         shared->sprg3 = swab64(shared->sprg3);
 156         shared->srr0 = swab64(shared->srr0);
 157         shared->srr1 = swab64(shared->srr1);
 158         shared->dar = swab64(shared->dar);
 159         shared->msr = swab64(shared->msr);
 160         shared->dsisr = swab32(shared->dsisr);
 161         shared->int_pending = swab32(shared->int_pending);
 162         for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
 163                 shared->sr[i] = swab32(shared->sr[i]);
 164 }
 165 #endif
 166
 167 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
 168 {
 169         int nr = kvmppc_get_gpr(vcpu, 11);
 170         int r;
 171         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
 172         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
 173         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
 174         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
 175         unsigned long r2 = 0;
 176
 177         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 178                 /* 32 bit mode */
 179                 param1 &= 0xffffffff;
 180                 param2 &= 0xffffffff;
 181                 param3 &= 0xffffffff;
 182                 param4 &= 0xffffffff;
 183         }
 184
 185         switch (nr) {
 186         case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
 187         {
 188 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 189                 /* Book3S can be little endian, find it out here */
 190                 int shared_big_endian = true;
 191                 if (vcpu->arch.intr_msr & MSR_LE)
 192                         shared_big_endian = false;
 193                 if (shared_big_endian != vcpu->arch.shared_big_endian)
 194                         kvmppc_swab_shared(vcpu);
 195                 vcpu->arch.shared_big_endian = shared_big_endian;
 196 #endif
 197
 198                 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
 199                         /*
 200                          * Older versions of the Linux magic page code had
 201                          * a bug where they would map their trampoline code
 202                          * NX. If that's the case, remove !PR NX capability.
 203                          */
 204                         vcpu->arch.disable_kernel_nx = true;
 205                         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 206                 }
 207
 208                 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
 209                 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
 210
 211 #ifdef CONFIG_PPC_64K_PAGES
 212                 /*
 213                  * Make sure our 4k magic page is in the same window of a 64k
 214                  * page within the guest and within the host's page.
 215                  */
 216                 if ((vcpu->arch.magic_page_pa & 0xf000) !=
 217                     ((ulong)vcpu->arch.shared & 0xf000)) {
 218                         void *old_shared = vcpu->arch.shared;
 219                         ulong shared = (ulong)vcpu->arch.shared;
 220                         void *new_shared;
 221
 222                         shared &= PAGE_MASK;
 223                         shared |= vcpu->arch.magic_page_pa & 0xf000;
 224                         new_shared = (void*)shared;
 225                         memcpy(new_shared, old_shared, 0x1000);
 226                         vcpu->arch.shared = new_shared;
 227                 }
 228 #endif
 229
 230                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
 231
 232                 r = EV_SUCCESS;
 233                 break;
 234         }
 235         case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
 236                 r = EV_SUCCESS;
 237 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
 238                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
 239 #endif
 240
 241                 /* Second return value is in r4 */
 242                 break;
 243         case EV_HCALL_TOKEN(EV_IDLE):
 244                 r = EV_SUCCESS;
 245                 kvm_vcpu_block(vcpu);
 246                 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
 247                 break;
 248         default:
 249                 r = EV_UNIMPLEMENTED;
 250                 break;
 251         }
 252
 253         kvmppc_set_gpr(vcpu, 4, r2);
 254
 255         return r;
 256 }
 257 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
 258
 259 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
 260 {
 261         int r = false;
 262
 263         /* We have to know what CPU to virtualize */
 264         if (!vcpu->arch.pvr)
 265                 goto out;
 266
 267         /* PAPR only works with book3s_64 */
 268         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 269                 goto out;
 270
 271         /* HV KVM can only do PAPR mode for now */
 272         if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
 273                 goto out;
 274
 275 #ifdef CONFIG_KVM_BOOKE_HV
 276         if (!cpu_has_feature(CPU_FTR_EMB_HV))
 277                 goto out;
 278 #endif
 279
 280         r = true;
 281
 282 out:
 283         vcpu->arch.sane = r;
 284         return r ? 0 : -EINVAL;
 285 }
 286 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
 287
 288 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 289 {
 290         enum emulation_result er;
 291         int r;
 292
 293         er = kvmppc_emulate_loadstore(vcpu);
 294         switch (er) {
 295         case EMULATE_DONE:
 296                 /* Future optimization: only reload non-volatiles if they were
 297                  * actually modified. */
 298                 r = RESUME_GUEST_NV;
 299                 break;
 300         case EMULATE_AGAIN:
 301                 r = RESUME_GUEST;
 302                 break;
 303         case EMULATE_DO_MMIO:
 304                 run->exit_reason = KVM_EXIT_MMIO;
 305                 /* We must reload nonvolatiles because "update" load/store
 306                  * instructions modify register state. */
 307                 /* Future optimization: only reload non-volatiles if they were
 308                  * actually modified. */
 309                 r = RESUME_HOST_NV;
 310                 break;
 311         case EMULATE_FAIL:
 312         {
 313                 u32 last_inst;
 314
 315                 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
 316                 /* XXX Deliver Program interrupt to guest. */
 317                 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
 318                 r = RESUME_HOST;
 319                 break;
 320         }
 321         default:
 322                 WARN_ON(1);
 323                 r = RESUME_GUEST;
 324         }
 325
 326         return r;
 327 }
 328 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
 329
 330 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 331               bool data)
 332 {
 333         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 334         struct kvmppc_pte pte;
 335         int r;
 336
 337         vcpu->stat.st++;
 338
 339         r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 340                          XLATE_WRITE, &pte);
 341         if (r < 0)
 342                 return r;
 343
 344         *eaddr = pte.raddr;
 345
 346         if (!pte.may_write)
 347                 return -EPERM;
 348
 349         /* Magic page override */
 350         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 351             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 352             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 353                 void *magic = vcpu->arch.shared;
 354                 magic += pte.eaddr & 0xfff;
 355                 memcpy(magic, ptr, size);
 356                 return EMULATE_DONE;
 357         }
 358
 359         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
 360                 return EMULATE_DO_MMIO;
 361
 362         return EMULATE_DONE;
 363 }
 364 EXPORT_SYMBOL_GPL(kvmppc_st);
 365
 366 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
 367                       bool data)
 368 {
 369         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
 370         struct kvmppc_pte pte;
 371         int rc;
 372
 373         vcpu->stat.ld++;
 374
 375         rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
 376                           XLATE_READ, &pte);
 377         if (rc)
 378                 return rc;
 379
 380         *eaddr = pte.raddr;
 381
 382         if (!pte.may_read)
 383                 return -EPERM;
 384
 385         if (!data && !pte.may_execute)
 386                 return -ENOEXEC;
 387
 388         /* Magic page override */
 389         if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
 390             ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
 391             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
 392                 void *magic = vcpu->arch.shared;
 393                 magic += pte.eaddr & 0xfff;
 394                 memcpy(ptr, magic, size);
 395                 return EMULATE_DONE;
 396         }
 397
 398         if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
 399                 return EMULATE_DO_MMIO;
 400
 401         return EMULATE_DONE;
 402 }
 403 EXPORT_SYMBOL_GPL(kvmppc_ld);
 404
 405 int kvm_arch_hardware_enable(void)
 406 {
 407         return 0;
 408 }
 409
 410 int kvm_arch_hardware_setup(void)
 411 {
 412         return 0;
 413 }
 414
 415 void kvm_arch_check_processor_compat(void *rtn)
 416 {
 417         *(int *)rtn = kvmppc_core_check_processor_compat();
 418 }
 419
 420 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 421 {
 422         struct kvmppc_ops *kvm_ops = NULL;
 423         /*
 424          * if we have both HV and PR enabled, default is HV
 425          */
 426         if (type == 0) {
 427                 if (kvmppc_hv_ops)
 428                         kvm_ops = kvmppc_hv_ops;
 429                 else
 430                         kvm_ops = kvmppc_pr_ops;
 431                 if (!kvm_ops)
 432                         goto err_out;
 433         } else  if (type == KVM_VM_PPC_HV) {
 434                 if (!kvmppc_hv_ops)
 435                         goto err_out;
 436                 kvm_ops = kvmppc_hv_ops;
 437         } else if (type == KVM_VM_PPC_PR) {
 438                 if (!kvmppc_pr_ops)
 439                         goto err_out;
 440                 kvm_ops = kvmppc_pr_ops;
 441         } else
 442                 goto err_out;
 443
 444         if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
 445                 return -ENOENT;
 446
 447         kvm->arch.kvm_ops = kvm_ops;
 448         return kvmppc_core_init_vm(kvm);
 449 err_out:
 450         return -EINVAL;
 451 }
 452
 453 bool kvm_arch_has_vcpu_debugfs(void)
 454 {
 455         return false;
 456 }
 457
 458 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
 459 {
 460         return 0;
 461 }
 462
 463 void kvm_arch_destroy_vm(struct kvm *kvm)
 464 {
 465         unsigned int i;
 466         struct kvm_vcpu *vcpu;
 467
 468 #ifdef CONFIG_KVM_XICS
 469         /*
 470          * We call kick_all_cpus_sync() to ensure that all
 471          * CPUs have executed any pending IPIs before we
 472          * continue and free VCPUs structures below.
 473          */
 474         if (is_kvmppc_hv_enabled(kvm))
 475                 kick_all_cpus_sync();
 476 #endif
 477
 478         kvm_for_each_vcpu(i, vcpu, kvm)
 479                 kvm_arch_vcpu_free(vcpu);
 480
 481         mutex_lock(&kvm->lock);
 482         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 483                 kvm->vcpus[i] = NULL;
 484
 485         atomic_set(&kvm->online_vcpus, 0);
 486
 487         kvmppc_core_destroy_vm(kvm);
 488
 489         mutex_unlock(&kvm->lock);
 490
 491         /* drop the module reference */
 492         module_put(kvm->arch.kvm_ops->owner);
 493 }
 494
 495 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 496 {
 497         int r;
 498         /* Assume we're using HV mode when the HV module is loaded */
 499         int hv_enabled = kvmppc_hv_ops ? 1 : 0;
 500
 501         if (kvm) {
 502                 /*
 503                  * Hooray - we know which VM type we're running on. Depend on
 504                  * that rather than the guess above.
 505                  */
 506                 hv_enabled = is_kvmppc_hv_enabled(kvm);
 507         }
 508
 509         switch (ext) {
 510 #ifdef CONFIG_BOOKE
 511         case KVM_CAP_PPC_BOOKE_SREGS:
 512         case KVM_CAP_PPC_BOOKE_WATCHDOG:
 513         case KVM_CAP_PPC_EPR:
 514 #else
 515         case KVM_CAP_PPC_SEGSTATE:
 516         case KVM_CAP_PPC_HIOR:
 517         case KVM_CAP_PPC_PAPR:
 518 #endif
 519         case KVM_CAP_PPC_UNSET_IRQ:
 520         case KVM_CAP_PPC_IRQ_LEVEL:
 521         case KVM_CAP_ENABLE_CAP:
 522         case KVM_CAP_ENABLE_CAP_VM:
 523         case KVM_CAP_ONE_REG:
 524         case KVM_CAP_IOEVENTFD:
 525         case KVM_CAP_DEVICE_CTRL:
 526         case KVM_CAP_IMMEDIATE_EXIT:
 527                 r = 1;
 528                 break;
 529         case KVM_CAP_PPC_PAIRED_SINGLES:
 530         case KVM_CAP_PPC_OSI:
 531         case KVM_CAP_PPC_GET_PVINFO:
 532 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 533         case KVM_CAP_SW_TLB:
 534 #endif
 535                 /* We support this only for PR */
 536                 r = !hv_enabled;
 537                 break;
 538 #ifdef CONFIG_KVM_MPIC
 539         case KVM_CAP_IRQ_MPIC:
 540                 r = 1;
 541                 break;
 542 #endif
 543
 544 #ifdef CONFIG_PPC_BOOK3S_64
 545         case KVM_CAP_SPAPR_TCE:
 546         case KVM_CAP_SPAPR_TCE_64:
 547                 /* fallthrough */
 548         case KVM_CAP_SPAPR_TCE_VFIO:
 549         case KVM_CAP_PPC_RTAS:
 550         case KVM_CAP_PPC_FIXUP_HCALL:
 551         case KVM_CAP_PPC_ENABLE_HCALL:
 552 #ifdef CONFIG_KVM_XICS
 553         case KVM_CAP_IRQ_XICS:
 554 #endif
 555         case KVM_CAP_PPC_GET_CPU_CHAR:
 556                 r = 1;
 557                 break;
 558
 559         case KVM_CAP_PPC_ALLOC_HTAB:
 560                 r = hv_enabled;
 561                 break;
 562 #endif /* CONFIG_PPC_BOOK3S_64 */
 563 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 564         case KVM_CAP_PPC_SMT:
 565                 r = 0;
 566                 if (kvm) {
 567                         if (kvm->arch.emul_smt_mode > 1)
 568                                 r = kvm->arch.emul_smt_mode;
 569                         else
 570                                 r = kvm->arch.smt_mode;
 571                 } else if (hv_enabled) {
 572                         if (cpu_has_feature(CPU_FTR_ARCH_300))
 573                                 r = 1;
 574                         else
 575                                 r = threads_per_subcore;
 576                 }
 577                 break;
 578         case KVM_CAP_PPC_SMT_POSSIBLE:
 579                 r = 1;
 580                 if (hv_enabled) {
 581                         if (!cpu_has_feature(CPU_FTR_ARCH_300))
 582                                 r = ((threads_per_subcore << 1) - 1);
 583                         else
 584                                 /* P9 can emulate dbells, so allow any mode */
 585                                 r = 8 | 4 | 2 | 1;
 586                 }
 587                 break;
 588         case KVM_CAP_PPC_RMA:
 589                 r = 0;
 590                 break;
 591         case KVM_CAP_PPC_HWRNG:
 592                 r = kvmppc_hwrng_present();
 593                 break;
 594         case KVM_CAP_PPC_MMU_RADIX:
 595                 r = !!(hv_enabled && radix_enabled());
 596                 break;
 597         case KVM_CAP_PPC_MMU_HASH_V3:
 598                 r = !!(hv_enabled && cpu_has_feature(CPU_FTR_ARCH_300));
 599                 break;
 600 #endif
 601         case KVM_CAP_SYNC_MMU:
 602 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 603                 r = hv_enabled;
 604 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 605                 r = 1;
 606 #else
 607                 r = 0;
 608 #endif
 609                 break;
 610 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 611         case KVM_CAP_PPC_HTAB_FD:
 612                 r = hv_enabled;
 613                 break;
 614 #endif
 615         case KVM_CAP_NR_VCPUS:
 616                 /*
 617                  * Recommending a number of CPUs is somewhat arbitrary; we
 618                  * return the number of present CPUs for -HV (since a host
 619                  * will have secondary threads "offline"), and for other KVM
 620                  * implementations just count online CPUs.
 621                  */
 622                 if (hv_enabled)
 623                         r = num_present_cpus();
 624                 else
 625                         r = num_online_cpus();
 626                 break;
 627         case KVM_CAP_NR_MEMSLOTS:
 628                 r = KVM_USER_MEM_SLOTS;
 629                 break;
 630         case KVM_CAP_MAX_VCPUS:
 631                 r = KVM_MAX_VCPUS;
 632                 break;
 633 #ifdef CONFIG_PPC_BOOK3S_64
 634         case KVM_CAP_PPC_GET_SMMU_INFO:
 635                 r = 1;
 636                 break;
 637         case KVM_CAP_SPAPR_MULTITCE:
 638                 r = 1;
 639                 break;
 640         case KVM_CAP_SPAPR_RESIZE_HPT:
 641                 r = !!hv_enabled;
 642                 break;
 643 #endif
 644 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 645         case KVM_CAP_PPC_FWNMI:
 646                 r = hv_enabled;
 647                 break;
 648 #endif
 649         case KVM_CAP_PPC_HTM:
 650                 r = hv_enabled &&
 651                     (cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM_COMP);
 652                 break;
 653         default:
 654                 r = 0;
 655                 break;
 656         }
 657         return r;
 658
 659 }
 660
 661 long kvm_arch_dev_ioctl(struct file *filp,
 662                         unsigned int ioctl, unsigned long arg)
 663 {
 664         return -EINVAL;
 665 }
 666
 667 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 668                            struct kvm_memory_slot *dont)
 669 {
 670         kvmppc_core_free_memslot(kvm, free, dont);
 671 }
 672
 673 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 674                             unsigned long npages)
 675 {
 676         return kvmppc_core_create_memslot(kvm, slot, npages);
 677 }
 678
 679 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 680                                    struct kvm_memory_slot *memslot,
 681                                    const struct kvm_userspace_memory_region *mem,
 682                                    enum kvm_mr_change change)
 683 {
 684         return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
 685 }
 686
 687 void kvm_arch_commit_memory_region(struct kvm *kvm,
 688                                    const struct kvm_userspace_memory_region *mem,
 689                                    const struct kvm_memory_slot *old,
 690                                    const struct kvm_memory_slot *new,
 691                                    enum kvm_mr_change change)
 692 {
 693         kvmppc_core_commit_memory_region(kvm, mem, old, new);
 694 }
 695
 696 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 697                                    struct kvm_memory_slot *slot)
 698 {
 699         kvmppc_core_flush_memslot(kvm, slot);
 700 }
 701
 702 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 703 {
 704         struct kvm_vcpu *vcpu;
 705         vcpu = kvmppc_core_vcpu_create(kvm, id);
 706         if (!IS_ERR(vcpu)) {
 707                 vcpu->arch.wqp = &vcpu->wq;
 708                 kvmppc_create_vcpu_debugfs(vcpu, id);
 709         }
 710         return vcpu;
 711 }
 712
 713 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 714 {
 715 }
 716
 717 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 718 {
 719         /* Make sure we're not using the vcpu anymore */
 720         hrtimer_cancel(&vcpu->arch.dec_timer);
 721
 722         kvmppc_remove_vcpu_debugfs(vcpu);
 723
 724         switch (vcpu->arch.irq_type) {
 725         case KVMPPC_IRQ_MPIC:
 726                 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
 727                 break;
 728         case KVMPPC_IRQ_XICS:
 729                 if (xive_enabled())
 730                         kvmppc_xive_cleanup_vcpu(vcpu);
 731                 else
 732                         kvmppc_xics_free_icp(vcpu);
 733                 break;
 734         }
 735
 736         kvmppc_core_vcpu_free(vcpu);
 737 }
 738
 739 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 740 {
 741         kvm_arch_vcpu_free(vcpu);
 742 }
 743
 744 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 745 {
 746         return kvmppc_core_pending_dec(vcpu);
 747 }
 748
 749 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 750 {
 751         struct kvm_vcpu *vcpu;
 752
 753         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 754         kvmppc_decrementer_func(vcpu);
 755
 756         return HRTIMER_NORESTART;
 757 }
 758
 759 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 760 {
 761         int ret;
 762
 763         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 764         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 765         vcpu->arch.dec_expires = get_tb();
 766
 767 #ifdef CONFIG_KVM_EXIT_TIMING
 768         mutex_init(&vcpu->arch.exit_timing_lock);
 769 #endif
 770         ret = kvmppc_subarch_vcpu_init(vcpu);
 771         return ret;
 772 }
 773
 774 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 775 {
 776         kvmppc_mmu_destroy(vcpu);
 777         kvmppc_subarch_vcpu_uninit(vcpu);
 778 }
 779
 780 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 781 {
 782 #ifdef CONFIG_BOOKE
 783         /*
 784          * vrsave (formerly usprg0) isn't used by Linux, but may
 785          * be used by the guest.
 786          *
 787          * On non-booke this is associated with Altivec and
 788          * is handled by code in book3s.c.
 789          */
 790         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 791 #endif
 792         kvmppc_core_vcpu_load(vcpu, cpu);
 793 }
 794
 795 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 796 {
 797         kvmppc_core_vcpu_put(vcpu);
 798 #ifdef CONFIG_BOOKE
 799         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 800 #endif
 801 }
 802
 803 /*
 804  * irq_bypass_add_producer and irq_bypass_del_producer are only
 805  * useful if the architecture supports PCI passthrough.
 806  * irq_bypass_stop and irq_bypass_start are not needed and so
 807  * kvm_ops are not defined for them.
 808  */
 809 bool kvm_arch_has_irq_bypass(void)
 810 {
 811         return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
 812                 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
 813 }
 814
 815 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
 816                                      struct irq_bypass_producer *prod)
 817 {
 818         struct kvm_kernel_irqfd *irqfd =
 819                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 820         struct kvm *kvm = irqfd->kvm;
 821
 822         if (kvm->arch.kvm_ops->irq_bypass_add_producer)
 823                 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
 824
 825         return 0;
 826 }
 827
 828 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
 829                                       struct irq_bypass_producer *prod)
 830 {
 831         struct kvm_kernel_irqfd *irqfd =
 832                 container_of(cons, struct kvm_kernel_irqfd, consumer);
 833         struct kvm *kvm = irqfd->kvm;
 834
 835         if (kvm->arch.kvm_ops->irq_bypass_del_producer)
 836                 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
 837 }
 838
 839 #ifdef CONFIG_VSX
 840 static inline int kvmppc_get_vsr_dword_offset(int index)
 841 {
 842         int offset;
 843
 844         if ((index != 0) && (index != 1))
 845                 return -1;
 846
 847 #ifdef __BIG_ENDIAN
 848         offset =  index;
 849 #else
 850         offset = 1 - index;
 851 #endif
 852
 853         return offset;
 854 }
 855
 856 static inline int kvmppc_get_vsr_word_offset(int index)
 857 {
 858         int offset;
 859
 860         if ((index > 3) || (index < 0))
 861                 return -1;
 862
 863 #ifdef __BIG_ENDIAN
 864         offset = index;
 865 #else
 866         offset = 3 - index;
 867 #endif
 868         return offset;
 869 }
 870
 871 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
 872         u64 gpr)
 873 {
 874         union kvmppc_one_reg val;
 875         int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
 876         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 877
 878         if (offset == -1)
 879                 return;
 880
 881         if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
 882                 val.vval = VCPU_VSX_VR(vcpu, index);
 883                 val.vsxval[offset] = gpr;
 884                 VCPU_VSX_VR(vcpu, index) = val.vval;
 885         } else {
 886                 VCPU_VSX_FPR(vcpu, index, offset) = gpr;
 887         }
 888 }
 889
 890 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
 891         u64 gpr)
 892 {
 893         union kvmppc_one_reg val;
 894         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 895
 896         if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
 897                 val.vval = VCPU_VSX_VR(vcpu, index);
 898                 val.vsxval[0] = gpr;
 899                 val.vsxval[1] = gpr;
 900                 VCPU_VSX_VR(vcpu, index) = val.vval;
 901         } else {
 902                 VCPU_VSX_FPR(vcpu, index, 0) = gpr;
 903                 VCPU_VSX_FPR(vcpu, index, 1) = gpr;
 904         }
 905 }
 906
 907 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
 908         u32 gpr32)
 909 {
 910         union kvmppc_one_reg val;
 911         int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
 912         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 913         int dword_offset, word_offset;
 914
 915         if (offset == -1)
 916                 return;
 917
 918         if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
 919                 val.vval = VCPU_VSX_VR(vcpu, index);
 920                 val.vsx32val[offset] = gpr32;
 921                 VCPU_VSX_VR(vcpu, index) = val.vval;
 922         } else {
 923                 dword_offset = offset / 2;
 924                 word_offset = offset % 2;
 925                 val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
 926                 val.vsx32val[word_offset] = gpr32;
 927                 VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
 928         }
 929 }
 930 #endif /* CONFIG_VSX */
 931
 932 #ifdef CONFIG_ALTIVEC
 933 static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
 934                 u64 gpr)
 935 {
 936         int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
 937         u32 hi, lo;
 938         u32 di;
 939
 940 #ifdef __BIG_ENDIAN
 941         hi = gpr >> 32;
 942         lo = gpr & 0xffffffff;
 943 #else
 944         lo = gpr >> 32;
 945         hi = gpr & 0xffffffff;
 946 #endif
 947
 948         di = 2 - vcpu->arch.mmio_vmx_copy_nums;         /* doubleword index */
 949         if (di > 1)
 950                 return;
 951
 952         if (vcpu->arch.mmio_host_swabbed)
 953                 di = 1 - di;
 954
 955         VCPU_VSX_VR(vcpu, index).u[di * 2] = hi;
 956         VCPU_VSX_VR(vcpu, index).u[di * 2 + 1] = lo;
 957 }
 958 #endif /* CONFIG_ALTIVEC */
 959
 960 #ifdef CONFIG_PPC_FPU
 961 static inline u64 sp_to_dp(u32 fprs)
 962 {
 963         u64 fprd;
 964
 965         preempt_disable();
 966         enable_kernel_fp();
 967         asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m" (fprd) : "m" (fprs)
 968              : "fr0");
 969         preempt_enable();
 970         return fprd;
 971 }
 972
 973 static inline u32 dp_to_sp(u64 fprd)
 974 {
 975         u32 fprs;
 976
 977         preempt_disable();
 978         enable_kernel_fp();
 979         asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m" (fprs) : "m" (fprd)
 980              : "fr0");
 981         preempt_enable();
 982         return fprs;
 983 }
 984
 985 #else
 986 #define sp_to_dp(x)     (x)
 987 #define dp_to_sp(x)     (x)
 988 #endif /* CONFIG_PPC_FPU */
 989
 990 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 991                                       struct kvm_run *run)
 992 {
 993         u64 uninitialized_var(gpr);
 994
 995         if (run->mmio.len > sizeof(gpr)) {
 996                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 997                 return;
 998         }
 999
1000         if (!vcpu->arch.mmio_host_swabbed) {
1001                 switch (run->mmio.len) {
1002                 case 8: gpr = *(u64 *)run->mmio.data; break;
1003                 case 4: gpr = *(u32 *)run->mmio.data; break;
1004                 case 2: gpr = *(u16 *)run->mmio.data; break;
1005                 case 1: gpr = *(u8 *)run->mmio.data; break;
1006                 }
1007         } else {
1008                 switch (run->mmio.len) {
1009                 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
1010                 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
1011                 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
1012                 case 1: gpr = *(u8 *)run->mmio.data; break;
1013                 }
1014         }
1015
1016         /* conversion between single and double precision */
1017         if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
1018                 gpr = sp_to_dp(gpr);
1019
1020         if (vcpu->arch.mmio_sign_extend) {
1021                 switch (run->mmio.len) {
1022 #ifdef CONFIG_PPC64
1023                 case 4:
1024                         gpr = (s64)(s32)gpr;
1025                         break;
1026 #endif
1027                 case 2:
1028                         gpr = (s64)(s16)gpr;
1029                         break;
1030                 case 1:
1031                         gpr = (s64)(s8)gpr;
1032                         break;
1033                 }
1034         }
1035
1036         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1037         case KVM_MMIO_REG_GPR:
1038                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1039                 break;
1040         case KVM_MMIO_REG_FPR:
1041                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1042                 break;
1043 #ifdef CONFIG_PPC_BOOK3S
1044         case KVM_MMIO_REG_QPR:
1045                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1046                 break;
1047         case KVM_MMIO_REG_FQPR:
1048                 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1049                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1050                 break;
1051 #endif
1052 #ifdef CONFIG_VSX
1053         case KVM_MMIO_REG_VSX:
1054                 if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_DWORD)
1055                         kvmppc_set_vsr_dword(vcpu, gpr);
1056                 else if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_WORD)
1057                         kvmppc_set_vsr_word(vcpu, gpr);
1058                 else if (vcpu->arch.mmio_vsx_copy_type ==
1059                                 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1060                         kvmppc_set_vsr_dword_dump(vcpu, gpr);
1061                 break;
1062 #endif
1063 #ifdef CONFIG_ALTIVEC
1064         case KVM_MMIO_REG_VMX:
1065                 kvmppc_set_vmx_dword(vcpu, gpr);
1066                 break;
1067 #endif
1068         default:
1069                 BUG();
1070         }
1071 }
1072
1073 static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1074                                 unsigned int rt, unsigned int bytes,
1075                                 int is_default_endian, int sign_extend)
1076 {
1077         int idx, ret;
1078         bool host_swabbed;
1079
1080         /* Pity C doesn't have a logical XOR operator */
1081         if (kvmppc_need_byteswap(vcpu)) {
1082                 host_swabbed = is_default_endian;
1083         } else {
1084                 host_swabbed = !is_default_endian;
1085         }
1086
1087         if (bytes > sizeof(run->mmio.data)) {
1088                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1089                        run->mmio.len);
1090         }
1091
1092         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1093         run->mmio.len = bytes;
1094         run->mmio.is_write = 0;
1095
1096         vcpu->arch.io_gpr = rt;
1097         vcpu->arch.mmio_host_swabbed = host_swabbed;
1098         vcpu->mmio_needed = 1;
1099         vcpu->mmio_is_write = 0;
1100         vcpu->arch.mmio_sign_extend = sign_extend;
1101
1102         idx = srcu_read_lock(&vcpu->kvm->srcu);
1103
1104         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1105                               bytes, &run->mmio.data);
1106
1107         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1108
1109         if (!ret) {
1110                 kvmppc_complete_mmio_load(vcpu, run);
1111                 vcpu->mmio_needed = 0;
1112                 return EMULATE_DONE;
1113         }
1114
1115         return EMULATE_DO_MMIO;
1116 }
1117
1118 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1119                        unsigned int rt, unsigned int bytes,
1120                        int is_default_endian)
1121 {
1122         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0);
1123 }
1124 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1125
1126 /* Same as above, but sign extends */
1127 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
1128                         unsigned int rt, unsigned int bytes,
1129                         int is_default_endian)
1130 {
1131         return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
1132 }
1133
1134 #ifdef CONFIG_VSX
1135 int kvmppc_handle_vsx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1136                         unsigned int rt, unsigned int bytes,
1137                         int is_default_endian, int mmio_sign_extend)
1138 {
1139         enum emulation_result emulated = EMULATE_DONE;
1140
1141         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1142         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1143                 return EMULATE_FAIL;
1144
1145         while (vcpu->arch.mmio_vsx_copy_nums) {
1146                 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1147                         is_default_endian, mmio_sign_extend);
1148
1149                 if (emulated != EMULATE_DONE)
1150                         break;
1151
1152                 vcpu->arch.paddr_accessed += run->mmio.len;
1153
1154                 vcpu->arch.mmio_vsx_copy_nums--;
1155                 vcpu->arch.mmio_vsx_offset++;
1156         }
1157         return emulated;
1158 }
1159 #endif /* CONFIG_VSX */
1160
1161 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1162                         u64 val, unsigned int bytes, int is_default_endian)
1163 {
1164         void *data = run->mmio.data;
1165         int idx, ret;
1166         bool host_swabbed;
1167
1168         /* Pity C doesn't have a logical XOR operator */
1169         if (kvmppc_need_byteswap(vcpu)) {
1170                 host_swabbed = is_default_endian;
1171         } else {
1172                 host_swabbed = !is_default_endian;
1173         }
1174
1175         if (bytes > sizeof(run->mmio.data)) {
1176                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1177                        run->mmio.len);
1178         }
1179
1180         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1181         run->mmio.len = bytes;
1182         run->mmio.is_write = 1;
1183         vcpu->mmio_needed = 1;
1184         vcpu->mmio_is_write = 1;
1185
1186         if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1187                 val = dp_to_sp(val);
1188
1189         /* Store the value at the lowest bytes in 'data'. */
1190         if (!host_swabbed) {
1191                 switch (bytes) {
1192                 case 8: *(u64 *)data = val; break;
1193                 case 4: *(u32 *)data = val; break;
1194                 case 2: *(u16 *)data = val; break;
1195                 case 1: *(u8  *)data = val; break;
1196                 }
1197         } else {
1198                 switch (bytes) {
1199                 case 8: *(u64 *)data = swab64(val); break;
1200                 case 4: *(u32 *)data = swab32(val); break;
1201                 case 2: *(u16 *)data = swab16(val); break;
1202                 case 1: *(u8  *)data = val; break;
1203                 }
1204         }
1205
1206         idx = srcu_read_lock(&vcpu->kvm->srcu);
1207
1208         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1209                                bytes, &run->mmio.data);
1210
1211         srcu_read_unlock(&vcpu->kvm->srcu, idx);
1212
1213         if (!ret) {
1214                 vcpu->mmio_needed = 0;
1215                 return EMULATE_DONE;
1216         }
1217
1218         return EMULATE_DO_MMIO;
1219 }
1220 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1221
1222 #ifdef CONFIG_VSX
1223 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1224 {
1225         u32 dword_offset, word_offset;
1226         union kvmppc_one_reg reg;
1227         int vsx_offset = 0;
1228         int copy_type = vcpu->arch.mmio_vsx_copy_type;
1229         int result = 0;
1230
1231         switch (copy_type) {
1232         case KVMPPC_VSX_COPY_DWORD:
1233                 vsx_offset =
1234                         kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1235
1236                 if (vsx_offset == -1) {
1237                         result = -1;
1238                         break;
1239                 }
1240
1241                 if (!vcpu->arch.mmio_vsx_tx_sx_enabled) {
1242                         *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
1243                 } else {
1244                         reg.vval = VCPU_VSX_VR(vcpu, rs);
1245                         *val = reg.vsxval[vsx_offset];
1246                 }
1247                 break;
1248
1249         case KVMPPC_VSX_COPY_WORD:
1250                 vsx_offset =
1251                         kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1252
1253                 if (vsx_offset == -1) {
1254                         result = -1;
1255                         break;
1256                 }
1257
1258                 if (!vcpu->arch.mmio_vsx_tx_sx_enabled) {
1259                         dword_offset = vsx_offset / 2;
1260                         word_offset = vsx_offset % 2;
1261                         reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
1262                         *val = reg.vsx32val[word_offset];
1263                 } else {
1264                         reg.vval = VCPU_VSX_VR(vcpu, rs);
1265                         *val = reg.vsx32val[vsx_offset];
1266                 }
1267                 break;
1268
1269         default:
1270                 result = -1;
1271                 break;
1272         }
1273
1274         return result;
1275 }
1276
1277 int kvmppc_handle_vsx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1278                         int rs, unsigned int bytes, int is_default_endian)
1279 {
1280         u64 val;
1281         enum emulation_result emulated = EMULATE_DONE;
1282
1283         vcpu->arch.io_gpr = rs;
1284
1285         /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1286         if (vcpu->arch.mmio_vsx_copy_nums > 4)
1287                 return EMULATE_FAIL;
1288
1289         while (vcpu->arch.mmio_vsx_copy_nums) {
1290                 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1291                         return EMULATE_FAIL;
1292
1293                 emulated = kvmppc_handle_store(run, vcpu,
1294                          val, bytes, is_default_endian);
1295
1296                 if (emulated != EMULATE_DONE)
1297                         break;
1298
1299                 vcpu->arch.paddr_accessed += run->mmio.len;
1300
1301                 vcpu->arch.mmio_vsx_copy_nums--;
1302                 vcpu->arch.mmio_vsx_offset++;
1303         }
1304
1305         return emulated;
1306 }
1307
1308 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu,
1309                         struct kvm_run *run)
1310 {
1311         enum emulation_result emulated = EMULATE_FAIL;
1312         int r;
1313
1314         vcpu->arch.paddr_accessed += run->mmio.len;
1315
1316         if (!vcpu->mmio_is_write) {
1317                 emulated = kvmppc_handle_vsx_load(run, vcpu, vcpu->arch.io_gpr,
1318                          run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1319         } else {
1320                 emulated = kvmppc_handle_vsx_store(run, vcpu,
1321                          vcpu->arch.io_gpr, run->mmio.len, 1);
1322         }
1323
1324         switch (emulated) {
1325         case EMULATE_DO_MMIO:
1326                 run->exit_reason = KVM_EXIT_MMIO;
1327                 r = RESUME_HOST;
1328                 break;
1329         case EMULATE_FAIL:
1330                 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1331                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1332                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1333                 r = RESUME_HOST;
1334                 break;
1335         default:
1336                 r = RESUME_GUEST;
1337                 break;
1338         }
1339         return r;
1340 }
1341 #endif /* CONFIG_VSX */
1342
1343 #ifdef CONFIG_ALTIVEC
1344 /* handle quadword load access in two halves */
1345 int kvmppc_handle_load128_by2x64(struct kvm_run *run, struct kvm_vcpu *vcpu,
1346                 unsigned int rt, int is_default_endian)
1347 {
1348         enum emulation_result emulated = EMULATE_DONE;
1349
1350         while (vcpu->arch.mmio_vmx_copy_nums) {
1351                 emulated = __kvmppc_handle_load(run, vcpu, rt, 8,
1352                                 is_default_endian, 0);
1353
1354                 if (emulated != EMULATE_DONE)
1355                         break;
1356
1357                 vcpu->arch.paddr_accessed += run->mmio.len;
1358                 vcpu->arch.mmio_vmx_copy_nums--;
1359         }
1360
1361         return emulated;
1362 }
1363
1364 static inline int kvmppc_get_vmx_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1365 {
1366         vector128 vrs = VCPU_VSX_VR(vcpu, rs);
1367         u32 di;
1368         u64 w0, w1;
1369
1370         di = 2 - vcpu->arch.mmio_vmx_copy_nums;         /* doubleword index */
1371         if (di > 1)
1372                 return -1;
1373
1374         if (vcpu->arch.mmio_host_swabbed)
1375                 di = 1 - di;
1376
1377         w0 = vrs.u[di * 2];
1378         w1 = vrs.u[di * 2 + 1];
1379
1380 #ifdef __BIG_ENDIAN
1381         *val = (w0 << 32) | w1;
1382 #else
1383         *val = (w1 << 32) | w0;
1384 #endif
1385         return 0;
1386 }
1387
1388 /* handle quadword store in two halves */
1389 int kvmppc_handle_store128_by2x64(struct kvm_run *run, struct kvm_vcpu *vcpu,
1390                 unsigned int rs, int is_default_endian)
1391 {
1392         u64 val = 0;
1393         enum emulation_result emulated = EMULATE_DONE;
1394
1395         vcpu->arch.io_gpr = rs;
1396
1397         while (vcpu->arch.mmio_vmx_copy_nums) {
1398                 if (kvmppc_get_vmx_data(vcpu, rs, &val) == -1)
1399                         return EMULATE_FAIL;
1400
1401                 emulated = kvmppc_handle_store(run, vcpu, val, 8,
1402                                 is_default_endian);
1403                 if (emulated != EMULATE_DONE)
1404                         break;
1405
1406                 vcpu->arch.paddr_accessed += run->mmio.len;
1407                 vcpu->arch.mmio_vmx_copy_nums--;
1408         }
1409
1410         return emulated;
1411 }
1412
1413 static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu,
1414                 struct kvm_run *run)
1415 {
1416         enum emulation_result emulated = EMULATE_FAIL;
1417         int r;
1418
1419         vcpu->arch.paddr_accessed += run->mmio.len;
1420
1421         if (!vcpu->mmio_is_write) {
1422                 emulated = kvmppc_handle_load128_by2x64(run, vcpu,
1423                                 vcpu->arch.io_gpr, 1);
1424         } else {
1425                 emulated = kvmppc_handle_store128_by2x64(run, vcpu,
1426                                 vcpu->arch.io_gpr, 1);
1427         }
1428
1429         switch (emulated) {
1430         case EMULATE_DO_MMIO:
1431                 run->exit_reason = KVM_EXIT_MMIO;
1432                 r = RESUME_HOST;
1433                 break;
1434         case EMULATE_FAIL:
1435                 pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
1436                 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1437                 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1438                 r = RESUME_HOST;
1439                 break;
1440         default:
1441                 r = RESUME_GUEST;
1442                 break;
1443         }
1444         return r;
1445 }
1446 #endif /* CONFIG_ALTIVEC */
1447
1448 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1449 {
1450         int r = 0;
1451         union kvmppc_one_reg val;
1452         int size;
1453
1454         size = one_reg_size(reg->id);
1455         if (size > sizeof(val))
1456                 return -EINVAL;
1457
1458         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1459         if (r == -EINVAL) {
1460                 r = 0;
1461                 switch (reg->id) {
1462 #ifdef CONFIG_ALTIVEC
1463                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1464                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1465                                 r = -ENXIO;
1466                                 break;
1467                         }
1468                         val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1469                         break;
1470                 case KVM_REG_PPC_VSCR:
1471                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1472                                 r = -ENXIO;
1473                                 break;
1474                         }
1475                         val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1476                         break;
1477                 case KVM_REG_PPC_VRSAVE:
1478                         val = get_reg_val(reg->id, vcpu->arch.vrsave);
1479                         break;
1480 #endif /* CONFIG_ALTIVEC */
1481                 default:
1482                         r = -EINVAL;
1483                         break;
1484                 }
1485         }
1486
1487         if (r)
1488                 return r;
1489
1490         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1491                 r = -EFAULT;
1492
1493         return r;
1494 }
1495
1496 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1497 {
1498         int r;
1499         union kvmppc_one_reg val;
1500         int size;
1501
1502         size = one_reg_size(reg->id);
1503         if (size > sizeof(val))
1504                 return -EINVAL;
1505
1506         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1507                 return -EFAULT;
1508
1509         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1510         if (r == -EINVAL) {
1511                 r = 0;
1512                 switch (reg->id) {
1513 #ifdef CONFIG_ALTIVEC
1514                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1515                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1516                                 r = -ENXIO;
1517                                 break;
1518                         }
1519                         vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1520                         break;
1521                 case KVM_REG_PPC_VSCR:
1522                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1523                                 r = -ENXIO;
1524                                 break;
1525                         }
1526                         vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1527                         break;
1528                 case KVM_REG_PPC_VRSAVE:
1529                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1530                                 r = -ENXIO;
1531                                 break;
1532                         }
1533                         vcpu->arch.vrsave = set_reg_val(reg->id, val);
1534                         break;
1535 #endif /* CONFIG_ALTIVEC */
1536                 default:
1537                         r = -EINVAL;
1538                         break;
1539                 }
1540         }
1541
1542         return r;
1543 }
1544
1545 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
1546 {
1547         int r;
1548
1549         vcpu_load(vcpu);
1550
1551         if (vcpu->mmio_needed) {
1552                 vcpu->mmio_needed = 0;
1553                 if (!vcpu->mmio_is_write)
1554                         kvmppc_complete_mmio_load(vcpu, run);
1555 #ifdef CONFIG_VSX
1556                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1557                         vcpu->arch.mmio_vsx_copy_nums--;
1558                         vcpu->arch.mmio_vsx_offset++;
1559                 }
1560
1561                 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1562                         r = kvmppc_emulate_mmio_vsx_loadstore(vcpu, run);
1563                         if (r == RESUME_HOST) {
1564                                 vcpu->mmio_needed = 1;
1565                                 goto out;
1566                         }
1567                 }
1568 #endif
1569 #ifdef CONFIG_ALTIVEC
1570                 if (vcpu->arch.mmio_vmx_copy_nums > 0)
1571                         vcpu->arch.mmio_vmx_copy_nums--;
1572
1573                 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1574                         r = kvmppc_emulate_mmio_vmx_loadstore(vcpu, run);
1575                         if (r == RESUME_HOST) {
1576                                 vcpu->mmio_needed = 1;
1577                                 goto out;
1578                         }
1579                 }
1580 #endif
1581         } else if (vcpu->arch.osi_needed) {
1582                 u64 *gprs = run->osi.gprs;
1583                 int i;
1584
1585                 for (i = 0; i < 32; i++)
1586                         kvmppc_set_gpr(vcpu, i, gprs[i]);
1587                 vcpu->arch.osi_needed = 0;
1588         } else if (vcpu->arch.hcall_needed) {
1589                 int i;
1590
1591                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1592                 for (i = 0; i < 9; ++i)
1593                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1594                 vcpu->arch.hcall_needed = 0;
1595 #ifdef CONFIG_BOOKE
1596         } else if (vcpu->arch.epr_needed) {
1597                 kvmppc_set_epr(vcpu, run->epr.epr);
1598                 vcpu->arch.epr_needed = 0;
1599 #endif
1600         }
1601
1602         kvm_sigset_activate(vcpu);
1603
1604         if (run->immediate_exit)
1605                 r = -EINTR;
1606         else
1607                 r = kvmppc_vcpu_run(run, vcpu);
1608
1609         kvm_sigset_deactivate(vcpu);
1610
1611 #ifdef CONFIG_ALTIVEC
1612 out:
1613 #endif
1614         vcpu_put(vcpu);
1615         return r;
1616 }
1617
1618 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1619 {
1620         if (irq->irq == KVM_INTERRUPT_UNSET) {
1621                 kvmppc_core_dequeue_external(vcpu);
1622                 return 0;
1623         }
1624
1625         kvmppc_core_queue_external(vcpu, irq);
1626
1627         kvm_vcpu_kick(vcpu);
1628
1629         return 0;
1630 }
1631
1632 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1633                                      struct kvm_enable_cap *cap)
1634 {
1635         int r;
1636
1637         if (cap->flags)
1638                 return -EINVAL;
1639
1640         switch (cap->cap) {
1641         case KVM_CAP_PPC_OSI:
1642                 r = 0;
1643                 vcpu->arch.osi_enabled = true;
1644                 break;
1645         case KVM_CAP_PPC_PAPR:
1646                 r = 0;
1647                 vcpu->arch.papr_enabled = true;
1648                 break;
1649         case KVM_CAP_PPC_EPR:
1650                 r = 0;
1651                 if (cap->args[0])
1652                         vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1653                 else
1654                         vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1655                 break;
1656 #ifdef CONFIG_BOOKE
1657         case KVM_CAP_PPC_BOOKE_WATCHDOG:
1658                 r = 0;
1659                 vcpu->arch.watchdog_enabled = true;
1660                 break;
1661 #endif
1662 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1663         case KVM_CAP_SW_TLB: {
1664                 struct kvm_config_tlb cfg;
1665                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1666
1667                 r = -EFAULT;
1668                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1669                         break;
1670
1671                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1672                 break;
1673         }
1674 #endif
1675 #ifdef CONFIG_KVM_MPIC
1676         case KVM_CAP_IRQ_MPIC: {
1677                 struct fd f;
1678                 struct kvm_device *dev;
1679
1680                 r = -EBADF;
1681                 f = fdget(cap->args[0]);
1682                 if (!f.file)
1683                         break;
1684
1685                 r = -EPERM;
1686                 dev = kvm_device_from_filp(f.file);
1687                 if (dev)
1688                         r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1689
1690                 fdput(f);
1691                 break;
1692         }
1693 #endif
1694 #ifdef CONFIG_KVM_XICS
1695         case KVM_CAP_IRQ_XICS: {
1696                 struct fd f;
1697                 struct kvm_device *dev;
1698
1699                 r = -EBADF;
1700                 f = fdget(cap->args[0]);
1701                 if (!f.file)
1702                         break;
1703
1704                 r = -EPERM;
1705                 dev = kvm_device_from_filp(f.file);
1706                 if (dev) {
1707                         if (xive_enabled())
1708                                 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1709                         else
1710                                 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1711                 }
1712
1713                 fdput(f);
1714                 break;
1715         }
1716 #endif /* CONFIG_KVM_XICS */
1717 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1718         case KVM_CAP_PPC_FWNMI:
1719                 r = -EINVAL;
1720                 if (!is_kvmppc_hv_enabled(vcpu->kvm))
1721                         break;
1722                 r = 0;
1723                 vcpu->kvm->arch.fwnmi_enabled = true;
1724                 break;
1725 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
1726         default:
1727                 r = -EINVAL;
1728                 break;
1729         }
1730
1731         if (!r)
1732                 r = kvmppc_sanity_check(vcpu);
1733
1734         return r;
1735 }
1736
1737 bool kvm_arch_intc_initialized(struct kvm *kvm)
1738 {
1739 #ifdef CONFIG_KVM_MPIC
1740         if (kvm->arch.mpic)
1741                 return true;
1742 #endif
1743 #ifdef CONFIG_KVM_XICS
1744         if (kvm->arch.xics || kvm->arch.xive)
1745                 return true;
1746 #endif
1747         return false;
1748 }
1749
1750 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1751                                     struct kvm_mp_state *mp_state)
1752 {
1753         return -EINVAL;
1754 }
1755
1756 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1757                                     struct kvm_mp_state *mp_state)
1758 {
1759         return -EINVAL;
1760 }
1761
1762 long kvm_arch_vcpu_async_ioctl(struct file *filp,
1763                                unsigned int ioctl, unsigned long arg)
1764 {
1765         struct kvm_vcpu *vcpu = filp->private_data;
1766         void __user *argp = (void __user *)arg;
1767
1768         if (ioctl == KVM_INTERRUPT) {
1769                 struct kvm_interrupt irq;
1770                 if (copy_from_user(&irq, argp, sizeof(irq)))
1771                         return -EFAULT;
1772                 return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1773         }
1774         return -ENOIOCTLCMD;
1775 }
1776
1777 long kvm_arch_vcpu_ioctl(struct file *filp,
1778                          unsigned int ioctl, unsigned long arg)
1779 {
1780         struct kvm_vcpu *vcpu = filp->private_data;
1781         void __user *argp = (void __user *)arg;
1782         long r;
1783
1784         vcpu_load(vcpu);
1785
1786         switch (ioctl) {
1787         case KVM_ENABLE_CAP:
1788         {
1789                 struct kvm_enable_cap cap;
1790                 r = -EFAULT;
1791                 if (copy_from_user(&cap, argp, sizeof(cap)))
1792                         goto out;
1793                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
1794                 break;
1795         }
1796
1797         case KVM_SET_ONE_REG:
1798         case KVM_GET_ONE_REG:
1799         {
1800                 struct kvm_one_reg reg;
1801                 r = -EFAULT;
1802                 if (copy_from_user(&reg, argp, sizeof(reg)))
1803                         goto out;
1804                 if (ioctl == KVM_SET_ONE_REG)
1805                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
1806                 else
1807                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
1808                 break;
1809         }
1810
1811 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1812         case KVM_DIRTY_TLB: {
1813                 struct kvm_dirty_tlb dirty;
1814                 r = -EFAULT;
1815                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
1816                         goto out;
1817                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
1818                 break;
1819         }
1820 #endif
1821         default:
1822                 r = -EINVAL;
1823         }
1824
1825 out:
1826         vcpu_put(vcpu);
1827         return r;
1828 }
1829
1830 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1831 {
1832         return VM_FAULT_SIGBUS;
1833 }
1834
1835 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
1836 {
1837         u32 inst_nop = 0x60000000;
1838 #ifdef CONFIG_KVM_BOOKE_HV
1839         u32 inst_sc1 = 0x44000022;
1840         pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
1841         pvinfo->hcall[1] = cpu_to_be32(inst_nop);
1842         pvinfo->hcall[2] = cpu_to_be32(inst_nop);
1843         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1844 #else
1845         u32 inst_lis = 0x3c000000;
1846         u32 inst_ori = 0x60000000;
1847         u32 inst_sc = 0x44000002;
1848         u32 inst_imm_mask = 0xffff;
1849
1850         /*
1851          * The hypercall to get into KVM from within guest context is as
1852          * follows:
1853          *
1854          *    lis r0, r0, KVM_SC_MAGIC_R0@h
1855          *    ori r0, KVM_SC_MAGIC_R0@l
1856          *    sc
1857          *    nop
1858          */
1859         pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
1860         pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
1861         pvinfo->hcall[2] = cpu_to_be32(inst_sc);
1862         pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1863 #endif
1864
1865         pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
1866
1867         return 0;
1868 }
1869
1870 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
1871                           bool line_status)
1872 {
1873         if (!irqchip_in_kernel(kvm))
1874                 return -ENXIO;
1875
1876         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1877                                         irq_event->irq, irq_event->level,
1878                                         line_status);
1879         return 0;
1880 }
1881
1882
1883 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
1884                                    struct kvm_enable_cap *cap)
1885 {
1886         int r;
1887
1888         if (cap->flags)
1889                 return -EINVAL;
1890
1891         switch (cap->cap) {
1892 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
1893         case KVM_CAP_PPC_ENABLE_HCALL: {
1894                 unsigned long hcall = cap->args[0];
1895
1896                 r = -EINVAL;
1897                 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
1898                     cap->args[1] > 1)
1899                         break;
1900                 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
1901                         break;
1902                 if (cap->args[1])
1903                         set_bit(hcall / 4, kvm->arch.enabled_hcalls);
1904                 else
1905                         clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
1906                 r = 0;
1907                 break;
1908         }
1909         case KVM_CAP_PPC_SMT: {
1910                 unsigned long mode = cap->args[0];
1911                 unsigned long flags = cap->args[1];
1912
1913                 r = -EINVAL;
1914                 if (kvm->arch.kvm_ops->set_smt_mode)
1915                         r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
1916                 break;
1917         }
1918 #endif
1919         default:
1920                 r = -EINVAL;
1921                 break;
1922         }
1923
1924         return r;
1925 }
1926
1927 #ifdef CONFIG_PPC_BOOK3S_64
1928 /*
1929  * These functions check whether the underlying hardware is safe
1930  * against attacks based on observing the effects of speculatively
1931  * executed instructions, and whether it supplies instructions for
1932  * use in workarounds.  The information comes from firmware, either
1933  * via the device tree on powernv platforms or from an hcall on
1934  * pseries platforms.
1935  */
1936 #ifdef CONFIG_PPC_PSERIES
1937 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
1938 {
1939         struct h_cpu_char_result c;
1940         unsigned long rc;
1941
1942         if (!machine_is(pseries))
1943                 return -ENOTTY;
1944
1945         rc = plpar_get_cpu_characteristics(&c);
1946         if (rc == H_SUCCESS) {
1947                 cp->character = c.character;
1948                 cp->behaviour = c.behaviour;
1949                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
1950                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
1951                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
1952                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
1953                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
1954                         KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
1955                         KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
1956                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
1957                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
1958                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
1959                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
1960         }
1961         return 0;
1962 }
1963 #else
1964 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
1965 {
1966         return -ENOTTY;
1967 }
1968 #endif
1969
1970 static inline bool have_fw_feat(struct device_node *fw_features,
1971                                 const char *state, const char *name)
1972 {
1973         struct device_node *np;
1974         bool r = false;
1975
1976         np = of_get_child_by_name(fw_features, name);
1977         if (np) {
1978                 r = of_property_read_bool(np, state);
1979                 of_node_put(np);
1980         }
1981         return r;
1982 }
1983
1984 static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
1985 {
1986         struct device_node *np, *fw_features;
1987         int r;
1988
1989         memset(cp, 0, sizeof(*cp));
1990         r = pseries_get_cpu_char(cp);
1991         if (r != -ENOTTY)
1992                 return r;
1993
1994         np = of_find_node_by_name(NULL, "ibm,opal");
1995         if (np) {
1996                 fw_features = of_get_child_by_name(np, "fw-features");
1997                 of_node_put(np);
1998                 if (!fw_features)
1999                         return 0;
2000                 if (have_fw_feat(fw_features, "enabled",
2001                                  "inst-spec-barrier-ori31,31,0"))
2002                         cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31;
2003                 if (have_fw_feat(fw_features, "enabled",
2004                                  "fw-bcctrl-serialized"))
2005                         cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED;
2006                 if (have_fw_feat(fw_features, "enabled",
2007                                  "inst-l1d-flush-ori30,30,0"))
2008                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30;
2009                 if (have_fw_feat(fw_features, "enabled",
2010                                  "inst-l1d-flush-trig2"))
2011                         cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2;
2012                 if (have_fw_feat(fw_features, "enabled",
2013                                  "fw-l1d-thread-split"))
2014                         cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV;
2015                 if (have_fw_feat(fw_features, "enabled",
2016                                  "fw-count-cache-disabled"))
2017                         cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2018                 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2019                         KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2020                         KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2021                         KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2022                         KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2023                         KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2024
2025                 if (have_fw_feat(fw_features, "enabled",
2026                                  "speculation-policy-favor-security"))
2027                         cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY;
2028                 if (!have_fw_feat(fw_features, "disabled",
2029                                   "needs-l1d-flush-msr-pr-0-to-1"))
2030                         cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR;
2031                 if (!have_fw_feat(fw_features, "disabled",
2032                                   "needs-spec-barrier-for-bound-checks"))
2033                         cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2034                 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2035                         KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2036                         KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2037
2038                 of_node_put(fw_features);
2039         }
2040
2041         return 0;
2042 }
2043 #endif
2044
2045 long kvm_arch_vm_ioctl(struct file *filp,
2046                        unsigned int ioctl, unsigned long arg)
2047 {
2048         struct kvm *kvm __maybe_unused = filp->private_data;
2049         void __user *argp = (void __user *)arg;
2050         long r;
2051
2052         switch (ioctl) {
2053         case KVM_PPC_GET_PVINFO: {
2054                 struct kvm_ppc_pvinfo pvinfo;
2055                 memset(&pvinfo, 0, sizeof(pvinfo));
2056                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
2057                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
2058                         r = -EFAULT;
2059                         goto out;
2060                 }
2061
2062                 break;
2063         }
2064         case KVM_ENABLE_CAP:
2065         {
2066                 struct kvm_enable_cap cap;
2067                 r = -EFAULT;
2068                 if (copy_from_user(&cap, argp, sizeof(cap)))
2069                         goto out;
2070                 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
2071                 break;
2072         }
2073 #ifdef CONFIG_SPAPR_TCE_IOMMU
2074         case KVM_CREATE_SPAPR_TCE_64: {
2075                 struct kvm_create_spapr_tce_64 create_tce_64;
2076
2077                 r = -EFAULT;
2078                 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
2079                         goto out;
2080                 if (create_tce_64.flags) {
2081                         r = -EINVAL;
2082                         goto out;
2083                 }
2084                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2085                 goto out;
2086         }
2087         case KVM_CREATE_SPAPR_TCE: {
2088                 struct kvm_create_spapr_tce create_tce;
2089                 struct kvm_create_spapr_tce_64 create_tce_64;
2090
2091                 r = -EFAULT;
2092                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
2093                         goto out;
2094
2095                 create_tce_64.liobn = create_tce.liobn;
2096                 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
2097                 create_tce_64.offset = 0;
2098                 create_tce_64.size = create_tce.window_size >>
2099                                 IOMMU_PAGE_SHIFT_4K;
2100                 create_tce_64.flags = 0;
2101                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2102                 goto out;
2103         }
2104 #endif
2105 #ifdef CONFIG_PPC_BOOK3S_64
2106         case KVM_PPC_GET_SMMU_INFO: {
2107                 struct kvm_ppc_smmu_info info;
2108                 struct kvm *kvm = filp->private_data;
2109
2110                 memset(&info, 0, sizeof(info));
2111                 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2112                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2113                         r = -EFAULT;
2114                 break;
2115         }
2116         case KVM_PPC_RTAS_DEFINE_TOKEN: {
2117                 struct kvm *kvm = filp->private_data;
2118
2119                 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
2120                 break;
2121         }
2122         case KVM_PPC_CONFIGURE_V3_MMU: {
2123                 struct kvm *kvm = filp->private_data;
2124                 struct kvm_ppc_mmuv3_cfg cfg;
2125
2126                 r = -EINVAL;
2127                 if (!kvm->arch.kvm_ops->configure_mmu)
2128                         goto out;
2129                 r = -EFAULT;
2130                 if (copy_from_user(&cfg, argp, sizeof(cfg)))
2131                         goto out;
2132                 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
2133                 break;
2134         }
2135         case KVM_PPC_GET_RMMU_INFO: {
2136                 struct kvm *kvm = filp->private_data;
2137                 struct kvm_ppc_rmmu_info info;
2138
2139                 r = -EINVAL;
2140                 if (!kvm->arch.kvm_ops->get_rmmu_info)
2141                         goto out;
2142                 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
2143                 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2144                         r = -EFAULT;
2145                 break;
2146         }
2147         case KVM_PPC_GET_CPU_CHAR: {
2148                 struct kvm_ppc_cpu_char cpuchar;
2149
2150                 r = kvmppc_get_cpu_char(&cpuchar);
2151                 if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar)))
2152                         r = -EFAULT;
2153                 break;
2154         }
2155         default: {
2156                 struct kvm *kvm = filp->private_data;
2157                 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
2158         }
2159 #else /* CONFIG_PPC_BOOK3S_64 */
2160         default:
2161                 r = -ENOTTY;
2162 #endif
2163         }
2164 out:
2165         return r;
2166 }
2167
2168 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
2169 static unsigned long nr_lpids;
2170
2171 long kvmppc_alloc_lpid(void)
2172 {
2173         long lpid;
2174
2175         do {
2176                 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
2177                 if (lpid >= nr_lpids) {
2178                         pr_err("%s: No LPIDs free\n", __func__);
2179                         return -ENOMEM;
2180                 }
2181         } while (test_and_set_bit(lpid, lpid_inuse));
2182
2183         return lpid;
2184 }
2185 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2186
2187 void kvmppc_claim_lpid(long lpid)
2188 {
2189         set_bit(lpid, lpid_inuse);
2190 }
2191 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
2192
2193 void kvmppc_free_lpid(long lpid)
2194 {
2195         clear_bit(lpid, lpid_inuse);
2196 }
2197 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2198
2199 void kvmppc_init_lpid(unsigned long nr_lpids_param)
2200 {
2201         nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
2202         memset(lpid_inuse, 0, sizeof(lpid_inuse));
2203 }
2204 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2205
2206 int kvm_arch_init(void *opaque)
2207 {
2208         return 0;
2209 }
2210
2211 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);